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elf: Add a test for PT_LOAD segments with p_align == 1 [BZ #28688]

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Add tst-p_alignmod2-edit to edit the copy of tst-p_alignmod-base.so to
set p_align of the first PT_LOAD segment to 1 and verify that the shared
library can be loaded normally.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
H.J. Lu
2021-12-21 12:25:20 -08:00
parent b5237c0746
commit e4c9268d15
3 changed files with 67 additions and 0 deletions
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13
elf/Makefile
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@@ -414,7 +414,9 @@ tests += \
tst-noload \
tst-null-argv \
tst-p_alignmod1-edit \
tst-p_alignmod2-edit \
tst-p_align1 \
tst-p_align2 \
tst-relsort1 \
tst-ro-dynamic \
tst-rtld-run-static \
@@ -2609,3 +2611,14 @@ $(objpfx)tst-p_alignmod1.so: $(objpfx)tst-p_alignmod1-edit \
cp $(objpfx)tst-p_alignmod-base.so $@
$(test-wrapper-env) $(run-program-env) $(rtld-prefix) \
$(objpfx)tst-p_alignmod1-edit $@
$(objpfx)tst-p_align2: $(objpfx)tst-p_alignmod2.so
# Make a copy of tst-p_alignmod-base.so and update p_align of the first
# PT_LOAD segment.
$(objpfx)tst-p_alignmod2.so: $(objpfx)tst-p_alignmod2-edit \
$(objpfx)tst-p_alignmod-base.so
rm -f $@
cp $(objpfx)tst-p_alignmod-base.so $@
$(test-wrapper-env) $(run-program-env) $(rtld-prefix) \
$(objpfx)tst-p_alignmod2-edit $@

27
elf/tst-p_align2.c Normal file
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@@ -0,0 +1,27 @@
/* Check different alignments of PT_LOAD segments in a shared library.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include "tst-p_align.h"
static int
do_test (void)
{
return do_load_test ();
}
#include <support/test-driver.c>

27
elf/tst-p_alignmod2-edit.c Normal file
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@@ -0,0 +1,27 @@
/* Set p_align of the first PT_LOAD segment to 1.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include "tst-elf-edit.h"
/* Set p_align to 1. */
static size_t
update_p_align (size_t p_align __attribute__ ((unused)))
{
return 1;
}